PersistentEntity must not be null

[mburns-acom]

I have code that is working expect that if any data is returned from dynamodb then I get "PersistentEntity must not be null". If the table is empty then I don't get any error. I have tried a few solutions but have not figured out what the problem is.
I see that the gemfire project had the same problem last year (spring-guides/gs-accessing-gemfire-data-rest#1).
Here is the important part of my POM.

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.derjust</groupId>
            <artifactId>spring-data-dynamodb</artifactId>
            <version>${springdata.dynamodb.version}</version>
        </dependency>

[mburns-acom]

It looks like this is related to #15